First, a title search is only as good as the searcher doing the search and the quality of the records being searched. 

Often when the pre-fab builds are cheaper they come without the longevity and quality of a traditional build.

Invest the Roth in a diversified pool of high-quality notes.

Are their listings detailed with good-quality photos?

I don’t think this is the quality of guests you are looking for.

Any feedback on quality and the software?

It seems like the local meetups can be hit or miss on the quality of people you can find yourself surrounded by.

If your knowledge of construction is low, you'd otherwise be relying on the GC to do everything correct w/ a reasonable level of quality (inspectors just look for minimal code compliance).   

In your situation, it is cost savings renting, which you explained makes a big deal in your quality of life.

The biggest mistake I see is to worry too much about the cost of things like lawn mowing and water bill and the exact percentage for vacancies, but not being enough aware of the general condition of the property - resulting in 20k, 50k or more in capex a few years down the road.My advice: look for a quality property that has all the big-ticket items already done.